Multi-scale Analysis of the Biogeography, Ecology, and Genetic Structure of Sand Pine in Florida

佛罗里达州沙松生物地理学、生态学和遗传结构的多尺度分析

• 批准号: 9313704
• 负责人: Kathleen Parker
• 金额: $ 17.5万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-01-15 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9313704&HistoricalAwards=false
• 关键词: Multi; scale; Analysis; Biogeography; Ecology

9313704 PARKER Many biogeographers, ecologists, population biologists, and other scientists have recognized that scale is an important factor to be considered in their research. Hierarchy theory has highlighted the need to evaluate the broader spatial scales inherent in regional environmental histories as a context within which ecological and genetic interactions occur at finer scales of resolution. In order to identify how regional processes of disturbance and regeneration relate to spatial patterns, age structures, and genetic composition of related species, this project will examine two types of sand pine (Pinus clausa) in Florida. Ocala sand pine occurs in peninsular Florida, while Choctawhatchee sand pine is present in the Florida panhandle. Both species exist in both coastal and inland locations, where they occupy similar environments, but their stands are separated by more than 100 km. The project will be conducted in two phases. The first will consist of collection of materials and data on the diameter and tree-ring structure of sample trees as well as soil, foliage, and other environmental data for 18 representative sites. This information will be evaluated through detailed allozyme analyses to determine genetic and ecological variations between Ocala and Choctawhatchee sand pine. During a second phase of research, the demographic and genetic structure of four or five representative stands will be mapped in detail. This mapping will permit assessment of the ways that environmental and disturbance histories have affected each kind of sand pine. Of particular concern to the experienced team of geographers and population biologists undertaking this project is degree to which the dispersion of different trees are related to differences in the scales of disturbance (such as localized canopy fires vs. wide-spread wind damage from hurricanes). Attention also focuses on the extent to which these differences are related to finer-scale variations in g enetic structures within populations. This focused case study of variations among two species of Florida sand pine will provide valuable tests of hypotheses related to a broader range of topics. In addition to providing new insights regarding the possible impacts of Quaternary sea- level change on the isolation and genetic differentiation of species, the results of this research will shed light on multi- scale relationships among site characteristics, disturbance ecology, and the genetic structure of vegetation. ***

9313704 Parker许多生物地理学家，生态学家，人口生物学家和其他科学家都认识到，规模是其研究中要考虑的重要因素。 层次结构理论强调了需要评估区域环境历史上固有的更广泛的空间量表，这是一种环境，在这种情况下，生态和遗传相互作用以更细的分辨率出现。 为了确定区域干扰和再生过程与相关物种的空间模式，年龄结构和遗传组成的关系，该项目将研究佛罗里达州的两种类型的沙丘（Pinus clausa）。 Ocala Sand Pine发生在佛罗里达半岛，而Choctawhatchee Sand Pine则存在于佛罗里达州的Panhandle中。 这两种物种都存在于沿海地区和内陆地区，它们都占据了相似的环境，但它们的林分被超过100公里。 该项目将分为两个阶段。 第一个将包括材料的收集以及有关样品树的直径和树环结构以及土壤，叶子和其他18个代表性地点的其他环境数据的收集。 该信息将通过详细的同化分析来评估，以确定Ocala和Choctawhatchee砂树之间的遗传和生态变化。 在第二阶段的研究中，将详细绘制四到五个代表性林分的人口统计和遗传结构。 该映射将允许评估环境和干扰历史影响每种砂岩的方式。 经验丰富的地理学家和人口生物学家团队特别关注的是该项目的程度，不同树木的分散与干扰尺度的差异有关（例如，局部顶篷大火与飓风的广泛风损伤）。 注意还集中于这些差异与种群中G enetic结构中较小尺度的变化有关的程度。 这项针对两种佛罗里达砂树之间变化的重点案例研究将提供与更广泛主题相关的假设的宝贵检验。 除了提供有关第四纪海平面变化对物种隔离和遗传分化的可能影响的新见解外，这项研究的结果还将揭示现场特征，干扰生态学和植被的遗传结构之间的多规模关系。 ***